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Finding the Fourth Proportional to 705,521.74, 972,693.54 and 509,123.41

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Solution

The fourth proportional to 705,521.74, 972,693.54 and 509,123.41 is: 701,921.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,521.74 : 972,693.54 = 509,123.41 : x
  2. Step 2: Convert to fraction form
    705,521.74/972,693.54 = 509,123.41/x
  3. Step 3: Cross multiply
    705,521.74x = 972,693.54 × 509,123.41
  4. Step 4: Simplify right side
    705,521.74x = 495,221,051,969.77
  5. Step 5: Solve for x
    x = 495,221,051,969.77/705,521.74
  6. Step 6: Final answer
    x = 701,921.75

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.